Slider



Dec, 22, 1936. l G. suNDBAcK u SLIDER Filed .my 22, 193s mi/ENTOR.Gideon SundbaU-Ii BY @@W. A RNEYS.

Patented Dec. 22, 1936 PATENT OFFICE SLIDER Gideon Snndback, Meadville,Pa., assignor to Hookless Fastener Company, Meadville, Pa., a ycorporation of Pennsylvania Application July 22, 1933, Serial No.681,721

2 Claims.

My invention relates to separable interlocking fasteners andparticularly to sliders for such fasteners.

The invention is intended` primarily for nonif, metallic fastenersalthough it can be used to advantage with certain metallic fasteners. g

An object of the invention is to provide a wear resisting surface on theparts of a slider which are most subject to wear. In 4sliders made frommetal, there is not much difficulty encountered on account of the wearof the slider, except in long lengths of fastener chain such as appliedto tents, rugs, etc. However, recent experiments with slide fastenersmade from cellulosic nitrate 1g material have demonstrated thatobjectionable wear is likely to occur on the slider in ordinary use.

According to my invention there are attached on the inner surfaces ofthe slider flanges which 5g@ are most subject to wear, small pieces ofwear resisting material. In one desirable embodiment, metal plates areanchored i'n place on the slider flanges but it is believed that certainnonmetallic materials will be found useful for the purpose. A pressedfiber material attached to the slider flanges would wear better than thecellulosic nitrate material of the slider body. It may in some cases bedesirable to make the body portion of the slider of relatively softplastic n material such as cellulose nitrate and the anges or portionsof them of relatively hard plastic material, such as bakelite. It isalso believed that certain impregnated fabric materials would be usefulfor the purpose.

35 tion can be stuck in 4place on the flanges by the use of solvent tosoften4 the cellulose nitrate material sumciently to cause it to adhereto the fabric. In the accompanying drawing I have shown 40 for purposesof illustration several embodiments of my invention. -In the drawing:

Fig. 1 is a general view of a slide fastener constructed in accordancewith my invention.

Fig. 2 is a cross-section on line 2-2 of Fig. 1;

5 Fig. 3 is a perspective view of one-half of a slider; I

Fig. 4 illustrates a second embodiment; and

Figs. 5 and 6 illustrate still other embodiments, Fig. 6 showing" a wearresisting insertl of fibrous 50 material.

The fastener shown in Fig. 1 is a common form having flemble supports,herein fabric tapes 1, with interlocking elements 8 attached theretoinluniformly spaced relation. The particular shape of the intkrlockingelements forms no Any thin fabric sec- 4 part of the present inventionand the ones illustrated are provided with projections S which engage inrecesses on the opposed interlocking members in a manner which iswell-known in the art. For the purpose of interlocking and re- 5 leasingthe elements there is provided a slider I0 having a pull member Ilattached thereto for actuating the same.

'I'he slider comprises a body of generally keystone-shape having aY-shaped channel I2 there- 10 in. The slider body has opposed parallelwings I3 connected at one end by a triangular shaped neck I4 and havingside anges I5. The flanges bear against the ends of the interlockingelements and it is at this point that most of the wear occurs inthe'slider. This is due to pulling thef fastener together under more orless lateral strain. The greatest wear occurs within the narrow end ofthe slider where the interlocking elements are brought into intermeshedrelation.

{I'he `wear resisting plates lI6 are attached to the inner surfaces ofthe slider flanges in such positions that. they will be concealed fromview and preferably, though not necessarily extend the full lengththereof. In the case of non--me- 25 tallic Wear resisting materials oreven with metallic materials, provided the surfaces are roughened, thewear plates may be stuck in place by cement, glue or similar bondingmaterial or if the slider body is of soluble material, the wear piecesmay be stuck'in place by softening the material with solventsuiilci'ently to cause the wear pieces to adhere firmly to them. e,

In Fig. 4 the entire slider flange VI`l ,is formed of the wear resistingmaterial and can be attached to the fiat slider wings by any suitablemeans. InFig. 5 there is shown a convenient wayofattaching a wear plate,particularly when the plate is made of metal.l The lugs I8 are turnedoutwardly at the ends of the wear pieces 40.

While I havexshown and described in this application one specic formand' several other embodiments which my invention may assume inpractice. it will be understood that these embodiments are merely forthepurposes of illustration I;

and description and that various other forms may be devised within thescope of my invention as described in the appended claims.

What I claim as -my invention is:

1. Aeslider for separable interlocking' trastien-4 ers of the classdescribed, comprising a bodv of generally keystone-shape having l`e.Y-shaped channel therein, the body having opposed wings and a neckconnection at one end o! the wings.

said wings having side ang'es extending towardv each other which angesbear against the ends of the fastener elements in closing vthe fastener,the slider body consisting of a relatively low wear resistantnon-metallic material to match the material of non-metallic fastenerelements, and substantially concealed metal plates anchored in place onthe slider anges so as to provide rela.-

fastener elements in closing the fastener, the i0 slider body consistingof a relatively low wear resistant non-metallic material; and wearresistant pieces anchored lnplace on the slider iianges in suchpositions as vto be concealed from view so as to provide relatively highwear resistant sur- 15 faces on said iianges v t GIDEON SUNDBACK.

